:root {
            --primary-color: #4e73df;
            --secondary-color: #224abe;
            --accent-color: #2e59d9;
        }
        
        body {
            background: linear-gradient(135deg, rgba(228, 235, 255, 0.85) 0%, rgba(206, 218, 255, 0.9) 100%), 
                        url('../images/Almacén.jpg') no-repeat center center fixed;
            background-size: cover;
            min-height: 100vh;
            display: flex;
            align-items: center;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        .login-container {
            max-width: 450px;
            width: 100%;
            margin: 0 auto;
            animation: fadeIn 0.8s ease-in-out;
        }
        
        .login-card {
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            overflow: hidden;
            backdrop-filter: blur(10px);
            background-color: rgba(255, 255, 255, 0.9);
            border: none;
        }
        
        .login-header {
            padding: 2rem;
            text-align: center;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
        }
        
        .login-logo img {
            max-width: 200px;
            filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
        }
        
        .login-body {
            padding: 2rem;
        }
        
        .form-control {
            height: 50px;
            border-radius: 8px;
            border: 1px solid #ddd;
            padding-left: 20px;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(78, 115, 223, 0.25);
        }
        
        .btn-login {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border: none;
            height: 50px;
            border-radius: 8px;
            font-weight: 600;
            letter-spacing: 0.5px;
            transition: all 0.3s;
        }
        
        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(78, 115, 223, 0.4);
        }
        
        .form-label {
            font-weight: 600;
            color: #555;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .input-group-text {
            background-color: #f8f9fa;
            border-right: none;
        }
        
        .input-group .form-control {
            border-left: none;
        }